Ministry of Jal Shakti
Per Capita Availability of Water
The study "Reassessment of Water Availability in India using Space Inputs" has been carried out by CWC in 2019. The average annual water resources of the 20 basins of the country have been assessed as 1999.20 Billion Cubic Meters . The per capita water availability is estimated by dividing the annual average water availability by the population. The average annual per capita water availability in the year 2011 has been assessed as 1545 cubic meters. Further, based on the above study, the average annual per capita water availability may further reduce to 1486 cubic meters by 2021. This is an average figure and will vary depending on the season and region. Water resource data is maintained basin-wise and not state-wise.
Water being a State subject, steps for augmentation, conservation and efficient management of water resources are primarily undertaken by the respective State Governments. In order to supplement the efforts of the State Governments, Central Government provides technical and financial assistance to them through various schemes and programmes.
Government of India launched Jal Shakti Abhiyan  in 2019, a time bound campaign with a mission mode approach intended to improve water availability including ground water conditions in the water stressed blocks of 256 districts in India. Further, Jal Shakti Abhiyan : Catch the Rain campaign has been launched by the Hon'ble Prime Minister of India on 22nd March, 2021 under which various activities will be carried out for rainwater conservation in all the districts of the country.
Central Government has formulated the National Perspective Plan  for Water Resources Development which envisages transfer of water from water surplus basins to water deficit basins to improve availability of water.
Government of India, in partnership with States, is implementing Jal Jeevan Mission -Har Ghar Jal, which aims at providing potable water in adequate quantity of prescribed quality on long-term basis to every rural households, including tribal areas of the country, through tap water connection by 2024.
Government of India has launched Atal Mission for Rejuvenation and Urban Transformation  on 25th June, 2015 in select 500 cities and towns across the country with focus on development of basic urban infrastructure in the Mission cities. One of the key objectives of the Mission is to ensure that every household has access to a tap connection with assured supply of water.
Ministry of Housing & Urban Affairs has formulated guidelines for the States to adopt measures suitable to local conditions to promote recharge of ground water. Adequate focus has been given on requirement of rainwater harvesting and water conservation measures in Unified Building Bye Laws  of Delhi, 2016, Model Building Bylaws , 2016 and Urban and Regional Development Plan Formulation and Implementation  Guidelines, 2014.
Some other initiatives/measures taken by the Central Government to control water depletion and promote rain water harvesting / conservation are available at the URL:
http://jalshakti-dowr.gov.in/sites/default /file/Steps_to_control_water_depletion_Feb2021.pdf
This information was given by the Minister of State for Jal Shakti & Social Justice and Empowerment Shri Rattan Lal Kataria in Lok Sabha today.